Expansion of log(1+tanh(sin(x))).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =6a(5) =1a(6) =-72a(7) =-1a(8) =1904a(9) =1a(10) =-89344a(11) =-1a(12) =6445824a(13) =1a(14) =-660602880a(15) =-1a(16) =91175548928a(17) =1a(19) =-1a(21) =1a(23) =-1a(25) =1a(27) =-1